How much rotational symmetry does a british flag?

Answer 1

Almost all flags are rectangular and so they cannot have rotational symmetry of an order greater than 2. The Union Jack is symmetrical after a 180 degree rotation and so has a symmetry of order 2.

However, the flag is not symmetrical under reflection. This is because, although St Andrew's Cross (white) is symmetrically placed, St Patrick's Cross (red) is offset.

Answer 2

Well, darling, a British flag has a whopping one count of rotational symmetry. It can be rotated 180 degrees and still look the same. So, if you're ever feeling turned around, just remember that the Union Jack keeps it simple with just one way to spin it and win it.

Answer 3

I am unaware of a British flag, but the Union Flag of the United Kingdom of Great Britain and Northern Ireland has a rotational symmetry of 2.

Answer 4

Yes, the flag can map onto itself with a rotation that is less than 360°.